12897447 has 12 divisors (see below), whose sum is σ = 18150840. Its totient is φ = 8145072.

The previous prime is 12897439. The next prime is 12897449. The reversal of 12897447 is 74479821.

It is a happy number.

12897447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12897447 - 2³ = 12897439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12897399 and 12897408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12897449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4872 + ... + 7037.

It is an arithmetic number, because the mean of its divisors is an integer number (1512570).

Almost surely, 2^12897447 is an apocalyptic number.

12897447 is a deficient number, since it is larger than the sum of its proper divisors (5253393).

12897447 is a wasteful number, since it uses less digits than its factorization.

12897447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11950 (or 11931 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 12897447 is about 3591.3015746384. The cubic root of 12897447 is about 234.5135372245.

The spelling of 12897447 in words is "twelve million, eight hundred ninety-seven thousand, four hundred forty-seven".